Solve the problem.A company installs 5000 light bulbs. Each bulb has an average life of 500 hours with a standard deviation of 100 hours. The life of each bulb is approximated by a normal curve. Find the number of bulbs that can be expected to last between 290 hours and 540 hours.
A. 3190
B. 1641
C. 1639
D. 3188
Answer: D
Mathematics
You might also like to view...
Evaluate the cylindrical coordinate integral.
A. 
B. 
C. 
D. 
Mathematics
Find the product.(5x - y + 4z)(5x - y - 4z)
A. 25x2 + y2 + 40xz + 8yz - 16z2 B. 25x2 - 10xy + y2 + 40xz + 8yz - 16z2 C. 25x2 + y2 - 16z2 D. 25x2 - 10xy + y2 - 16z2
Mathematics
Provide an appropriate response.Find the circumference of a circle whose diameter is 17 cm (round to the nearest hundredth).
Fill in the blank(s) with the appropriate word(s).
Mathematics
Provide an appropriate response.Assume a is positive, b is negative, and c is positive for the expressiona ? b3 ? cTell whether the value of the given expression is positive, negative or cannot be determined.
A. Positive B. Cannot be determined C. Negative
Mathematics